Calculator for



2 SHEETS-SHEET I.

Patented July 19; 1921.

0. VILLEGAS.

CALCULATOR FOR MATURITIES. APPLICATION FILED MAY I, 1919.

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1,384,789. Patented July 19, 1921.

2 SHEETS-SHEET 2.

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UNITED STATES.

PATENT OFFICE.

CARLOS VILLEGAS, OF BROOKLYN, NEW YORK.

CALCULATOR FOR MATURI'IIES.

Specification of Letters Patent.

Patented July 19, 1921.

Application filed May 1, 1919. Serial No. 294,106.

and State of New York, have invented cer-' tain new and useful Improvements in Calculators for Maturities, of which the following is a description.

My invention relates to the calculation of the dates of maturity of drafts and the like which have to pass through the mail, and has as its principal object the provision of means whereby such dates may be determined both accurately and rapidly.

The novel features of my invention are pointed out with particularity in the ap pended claims. The invention itself, however, together with further objects and ad vantages, will best be understood by reference to the following description taken in connection with the accompanying drawing, in which- Figure 1 is a plan view, partly broken away, of apparatus for carrying out my invention as arranged for. use;

Fig.2 is a plan view of the bottom one.

of the two sheets shown in Fig.1;

Fig. 3 is a section taken on the line g -g of Fig. 1. V

In the separate views, the same part is designated by the same referencecharacter.

As indicated in Fig. 1, in my complete device I employ a top sheet orcover 1, beneath which a sheet, such as 2, is used in order to obtain the date of maturity of a given instrument. p v The sheet 2 as shown is one of a set of twelve synoptic tables, there being one for each month of the year whereas I provide only one cover sheet, such as 1. Each sheet,

- such as 2, has marked off'thereon alarge rectangular space105, the bottom edge of i which is indicated at 3, the right edge at 41,

the left-hand edge at 5, and the top edge at 6. This large rectangle is divided by parallel lines into rectangles such as 110 of intermediate size, as for instance, the one bounded by lines 7 8, 9 and 10. Consequently the rectangles 110 of'intermediate size'are arranged in vertical columns and horizontal rows." Each vertical column ofrectangles 1 10 islabeled, and the dates of maturity of instruments of the same tenor are arranged in a given column, marked Sight, 3 days,etc., as the case may be. Each horizontal row of rectangles 110 contains the maturity dates of instruments which require a given number of 'days in the mail to reach the places on which they are drawn. The days in the mail, one way, of all the rows, appear in the column marked Mail at the left of the large rectangle 105, the dates being so arranged that maturities, of all instru ments requiring the same number of days in the mail appear in the same row.

Each of the intermediate rectangles 110 is divided in turn into smaller rectangles, one of which is indicated at 111, there being space enough in the intermediate rectangles for thirty-six of these small rectangles. The dates appearing in the small rectangles 111, are preferably arranged in six columns, the first five columns from the left containing five dates, and the sixth column containing three, four, five or six, depending upon the number of days inthe month for which the particular sheet or table is made up. The. dates in the small columns just mentioned are arranged so that the 'one occurring first is in the upper left hand corner of the intermediate rectangle 110', the dates in each such small column being one day later as the column is followed from top to bottom, and the date at the top of one column being one day later than that at the bottom of the column to its left. The sheet or table shown in Fig. 2 is made up for the month of April'and the small rectangles containing the individual dates in the intermediate rectangle 110at the upper left-hand cornerof the large rectangle are numbered from 1 to 30, the numbers increasing in the manner previously describedfor the dates. This intermediate rectangle, having the small rec v tangles numbered, preferably contains the dates of maturity of those instrument-s first to mature, these being instruments payable at sight and drawn on places requiring the minimum time in the mail to reach.

Accordingly it will be seen that the sheet for April, as shown in Fig. 2, has the date 5.1 in the upper left-hand cornerof the upper left-handintermediate rectangle, this being the date on which a sight-draft, dated April first, would become due if drawn on a place fifteen days away by mail one way, or thirty days away both ways. The date of maturity of any other-sight draft dated in April, requiring the same number of days in the mail, would be found in the same group of dates, or, in other words,in the same intermediate rectangle'in the small rec 7 this date being May eleventh. -Similarly,

the date of maturity of, a sight draft drawn on the same place and dated April nineteenth is found in the small space or rectangle in thesecond group in the sight column, which has a position corresponding to the one marked 19 in the first group in this column. In a similar way the date of maturity may be found for any instrument having. a tenor and time in mail given in the chart. The chart shown in Fi g. 2 is constructed to include instruments of a tenor up to-one hundred and fifty days and ninetyfive days in the mail for tenors and mail time commonly used in computing maturities. The dates at the lower right-hand corner of the sheet run into the succeeding year, these dates being shown on Fig. 2 by inclined numerals as indicated at 112;

It will be seen that if the order of the dates in the groups is known, there is no necessityof numbering the spaces containing the individual dates, but I find that numbering thespaces reduces the liability to errors. However, for reasons that will presently appear, I prefer to number the small rectangles only in the first intermediate rectangle 110 in the sight column as indicated at 113, and there being thirty days in Aprilthese numbers run from 1 to 30, increasing in the same order as explained for the dates in the groups. 7

In order to facilitate obtaining the desired date of maturity and to insure against error, I prefer to use a cover sheet, such as 1, and

I provide for use in connection with said cover sheet at least two, and preferably four rectangles, such as 114, of the saine sizeas intermediate rectangles 110, near the corners and ;;outside ofthe large rectangle 105.

- Said two or four rectangles 114 are'divided into small rectangles of-thc same size. as 111, and these small rectangles are numbered from 51 up in the same manner as previously described in connection with the numbers 113. However, the figures in're'ctangles 114 are placed in the centers of their spaces and thecover sheet 1 has apertures such as 12 cut therein and so. arranged that when a given number, such as 7 in rectangles 114 appears in the apertures in the cover sheet,

then the dates in the corresponding positions in all the intermediate rectangles 110 are brought into view. Consequently, the dates of maturity of all instruments drawn on the seventh of April can be read quickly and accurately; To facilitate the use of cover sheetl, it is ruled into intermediate rectangles in the same way as sheet 2, the rectangles in which the openings for the pres ent date are placed'being marked A, B, C and D respectively. The cover sheet can, however, be omitted while still using the broad principle of my invention.

VVhile' the arrangement of the" dates of each vgroup in six columns as described above is the arrangement preferred by me, I consider as within the scope of my invention any device in which dates are arranged in groups and the groups arranged in columns and rows according to the tenor and time in the mail of the instruments, and in which the dates have the same arrangement in the groups 7 Having thus described my invention, I claim:

1. A means for obtaining dates of maturity,- comprising a table for a given month having the maturity dates arranged in groups, said groups being arranged in intersecting columns and rows according to the tenor and time in themail of the instrument, the order and arrangement of the dates being the" same in all groups. 1 2. A means for obtaining dates of maturity, comprising a table for a given month having the ,maturity dates arranged in groups,said groups being arranged in intersecting columns and rows accordingto the tenor and time in the mail of the instrument. the orderand arrangement of the dates being the same in all, groups, each of'said groups having as many individual dates therein as there are days in the saidgiven month,

3. A means for obtaining dates of maturity, comprisinga table for a given month having the. maturity dates arranged in groups, said groups being arranged in .intersecting columns and rows according to the tenor and time, in the mail of the in strument, the order and arrangement of the dates being the same in all groups,.eachrof said groups having as many individual dates therein as there are days in thesaid-given month, the individual dates in each .group being arranged in order of occurrence in six smaller columns,: there being five dates in the first five of such smaller colum'nscounting from leftto right, and asmany? in the sixth; of such smaller columns as are necessary to make up the number of day'sof the given month, the first "date inlaa group to occur being. at the upper left-handworner, and the lastat. the lower right-hand corner thereof. I

1. A means ity, comprising a sheet for a given month having the "maturity dates arrangedwin groups, said groups being arranged inintersecting columns and rows according. to the for obtaining dates of:mati1r 1 tenor and time in the mail of the instrument,

the arrangement of thedates being the same in all groups, each of said groups having as many individual dates therein as there are days in the said given month, the individual dates in each group being arranged in order of occurrence in six smaller columns, there being five dates in the first five of such smaller columns counting from left to right, and as many in the sixth of such smaller columns as are necessary to make up the number of days of the given month, the first date in a group to occur being at the upper left-hand corner, and the last at the lower right-hand corner thereof, said sheet having at least two groups of figures in addition to said groups of dates and beginning with 1 running up to the number of the last day of said given month, said groups of figures being arranged in the same order as said groups of dates, and a cover having apertures therein sospaced that when two of said apertures are placed over a given number in said groups of figures the correspondingly placed date in each group of dates will be visible.

5. A means for obtaining dates of maturity, comprising a sheet for a given month having the maturity dates arranged in groups, said groups being arranged in intersecting columns and rows according to the tenor and time in the mail of the instru- 'ment, the order and arrangement of the are placed over the correspondingly placed dates in two of said groups the correspond ing dates in the remainder of said groups may be read therethrough.

6. A means for obtaining dates of maturity, comprising a sheet for a given month having the maturity dates arranged in groups, said groups being arranged in intersecting columns and rows according to the tenor and time in the mail of the instrument, the order and arrangement of the dates being the same in all groups, each of said groups having asmany individual dates therein as there are days in the said given month, a cover having apertures therein so spaced that when two of said apertures are placed over the correspondingly placed dates in two of said groups the corresponding dates in the remainder of said groups may be read therethrough, and means for indicating to the operator the proper relative position of the cover with respect to said sheet correspondin to the instant date.

dAaLos VILLEGAS. 

